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<h1>led.c</h1><a href="led_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*********************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> Copyright 2006 MakingThings</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Licensed under the Apache License, </span>
<a name="l00006"></a>00006 <span class="comment"> Version 2.0 (the "License"); you may not use this file except in compliance </span>
<a name="l00007"></a>00007 <span class="comment"> with the License. You may obtain a copy of the License at</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> http://www.apache.org/licenses/LICENSE-2.0 </span>
<a name="l00010"></a>00010 <span class="comment"> </span>
<a name="l00011"></a>00011 <span class="comment"> Unless required by applicable law or agreed to in writing, software distributed</span>
<a name="l00012"></a>00012 <span class="comment"> under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR</span>
<a name="l00013"></a>00013 <span class="comment"> CONDITIONS OF ANY KIND, either express or implied. See the License for</span>
<a name="l00014"></a>00014 <span class="comment"> the specific language governing permissions and limitations under the License.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment">*********************************************************************************/</span>
<a name="l00017"></a>00017 <span class="comment"></span>
<a name="l00018"></a>00018 <span class="comment">/** \file led.c </span>
<a name="l00019"></a>00019 <span class="comment">  Controller LED.</span>
<a name="l00020"></a>00020 <span class="comment">  Functions for controlling the status LED on the Make Controller Board.</span>
<a name="l00021"></a>00021 <span class="comment">*/</span>
<a name="l00022"></a>00022 
<a name="l00023"></a>00023 <span class="preprocessor">#include "io.h"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "config.h"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "led.h"</span>
<a name="l00026"></a>00026 
<a name="l00027"></a>00027 <span class="keyword">static</span> <span class="keywordtype">int</span> Led_users;
<a name="l00028"></a>00028 
<a name="l00029"></a>00029 <span class="preprocessor">#if ( CONTROLLER_VERSION == 50 )</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor">  #define LED_IO IO_PB25</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span><span class="preprocessor">#if ( CONTROLLER_VERSION == 90 )</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor">  #define LED_IO IO_PB12</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span><span class="preprocessor">#if ( CONTROLLER_VERSION == 95 || CONTROLLER_VERSION == 100 )</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor">  #define LED_IO IO_PA12</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span>
<a name="l00039"></a>00039 <span class="keyword">static</span> <span class="keywordtype">int</span> Led_Start( <span class="keywordtype">void</span> );
<a name="l00040"></a>00040 <span class="keyword">static</span> <span class="keywordtype">int</span> Led_Stop( <span class="keywordtype">void</span> );
<a name="l00041"></a>00041 <span class="comment"></span>
<a name="l00042"></a>00042 <span class="comment">/** LED</span>
<a name="l00043"></a>00043 <span class="comment">* This whole thing needs to run on timers and events so that the LED can </span>
<a name="l00044"></a>00044 <span class="comment">* be asked to flash at various times</span>
<a name="l00045"></a>00045 <span class="comment">*/</span>
<a name="l00046"></a>00046 <span class="comment"></span>
<a name="l00047"></a>00047 <span class="comment">/** \defgroup Led</span>
<a name="l00048"></a>00048 <span class="comment">  The Led subsystem controls the single green LED on the MAKE Controller Board.</span>
<a name="l00049"></a>00049 <span class="comment">  There are two LEDs on the MAKE Controller Board - one green and one red.  The red LED is simply</span>
<a name="l00050"></a>00050 <span class="comment">  a power indicator and cannot be controlled by the Controller.  The green LED can be used for</span>
<a name="l00051"></a>00051 <span class="comment">  program feedback.  In many MakingThings applications, for example, it is set to blink once a</span>
<a name="l00052"></a>00052 <span class="comment">  second, showing the board's "heartbeat" and letting the user know that the board is running.</span>
<a name="l00053"></a>00053 <span class="comment">* \ingroup Controller</span>
<a name="l00054"></a>00054 <span class="comment">* @{</span>
<a name="l00055"></a>00055 <span class="comment">*/</span>
<a name="l00056"></a>00056 <span class="comment"></span>
<a name="l00057"></a>00057 <span class="comment">/**</span>
<a name="l00058"></a>00058 <span class="comment">  Sets whether the Led subsystem is active.</span>
<a name="l00059"></a>00059 <span class="comment">  @param state An integer specifying the active state of the LED system - 1 (on) or 0 (off).</span>
<a name="l00060"></a>00060 <span class="comment">  @return Zero on success.</span>
<a name="l00061"></a>00061 <span class="comment">*/</span>
<a name="l00062"></a><a class="code" href="group___led.html#ga1057208ee347d14ad90b5da3d744da0">00062</a> <span class="keywordtype">int</span> <a class="code" href="group___led.html#ga1057208ee347d14ad90b5da3d744da0" title="Sets whether the Led subsystem is active.">Led_SetActive</a>( <span class="keywordtype">int</span> state )
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064   <span class="keywordflow">if</span> ( state )
<a name="l00065"></a>00065     <span class="keywordflow">return</span> Led_Start( );
<a name="l00066"></a>00066   <span class="keywordflow">else</span>
<a name="l00067"></a>00067     <span class="keywordflow">return</span> Led_Stop( );
<a name="l00068"></a>00068 }
<a name="l00069"></a>00069 <span class="comment"></span>
<a name="l00070"></a>00070 <span class="comment">/**</span>
<a name="l00071"></a>00071 <span class="comment">  Read the active state of the LED system.</span>
<a name="l00072"></a>00072 <span class="comment">  @return State - 1/non-zero (on) or 0 (off).</span>
<a name="l00073"></a>00073 <span class="comment">*/</span>
<a name="l00074"></a><a class="code" href="group___led.html#ga4cc024549d3835bcd0adca90366d881">00074</a> <span class="keywordtype">int</span> <a class="code" href="group___led.html#ga4cc024549d3835bcd0adca90366d881" title="Read the active state of the LED system.">Led_GetActive</a>( )
<a name="l00075"></a>00075 {
<a name="l00076"></a>00076   <span class="keywordflow">return</span> Led_users &gt; 0;
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078 <span class="comment"></span>
<a name="l00079"></a>00079 <span class="comment">/** </span>
<a name="l00080"></a>00080 <span class="comment">  Control the LED on the MAKE Controller Board.</span>
<a name="l00081"></a>00081 <span class="comment">  @param state An integer specifying the state - on (1) or off (0).</span>
<a name="l00082"></a>00082 <span class="comment">  @return 0 on success.</span>
<a name="l00083"></a>00083 <span class="comment">*/</span>
<a name="l00084"></a><a class="code" href="group___led.html#g64a0db609a52e4ef919b13e62f3557a9">00084</a> <span class="keywordtype">int</span> <a class="code" href="group___led.html#g64a0db609a52e4ef919b13e62f3557a9" title="Control the LED on the MAKE Controller Board.">Led_SetState</a>( <span class="keywordtype">int</span> state )
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086   <span class="keywordflow">if</span> ( Led_users == 0 )
<a name="l00087"></a>00087   {
<a name="l00088"></a>00088     <span class="keywordtype">int</span> status = Led_Start();
<a name="l00089"></a>00089     <span class="keywordflow">if</span> ( status != <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a> )
<a name="l00090"></a>00090       <span class="keywordflow">return</span> status;
<a name="l00091"></a>00091   }
<a name="l00092"></a>00092 
<a name="l00093"></a>00093   <span class="keywordflow">return</span> <a class="code" href="group___io.html#g31c976a85de4306c66be6b4c441d3892" title="Turn an IO line on or off.">Io_SetValue</a>( LED_IO, !state );
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 <span class="comment"></span>
<a name="l00096"></a>00096 <span class="comment">/** </span>
<a name="l00097"></a>00097 <span class="comment">  Read the state of the LED on the MAKE Controller Board.</span>
<a name="l00098"></a>00098 <span class="comment">  @return State - 1/non-zero (on) or 0 (off).</span>
<a name="l00099"></a>00099 <span class="comment">*/</span>
<a name="l00100"></a><a class="code" href="group___led.html#ga22ae43adcee63c5f750649a02c59a65">00100</a> <span class="keywordtype">int</span> <a class="code" href="group___led.html#ga22ae43adcee63c5f750649a02c59a65" title="Read the state of the LED on the MAKE Controller Board.">Led_GetState</a>( )
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102   <span class="keywordflow">if</span> ( Led_users == 0 )
<a name="l00103"></a>00103   {
<a name="l00104"></a>00104     <span class="keywordtype">int</span> status = Led_Start();
<a name="l00105"></a>00105     <span class="keywordflow">if</span> ( status != <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a> )
<a name="l00106"></a>00106       <span class="keywordflow">return</span> status;
<a name="l00107"></a>00107   }
<a name="l00108"></a>00108 
<a name="l00109"></a>00109   <span class="keywordflow">return</span> <a class="code" href="group___io.html#gfdcf7332d0ae5b38d2a776fb6cc5ba7b" title="Read whether an IO line, presumably set as an output, is on or off.">Io_GetValue</a>( LED_IO ) ? 0 : 1;
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111 <span class="comment"></span>
<a name="l00112"></a>00112 <span class="comment">/** @}</span>
<a name="l00113"></a>00113 <span class="comment">*/</span>
<a name="l00114"></a>00114 
<a name="l00115"></a>00115 <span class="keywordtype">int</span> Led_Start()
<a name="l00116"></a>00116 {
<a name="l00117"></a>00117   <span class="keywordflow">if</span> ( Led_users == 0 )
<a name="l00118"></a>00118   {
<a name="l00119"></a>00119     <span class="keywordtype">int</span> status;
<a name="l00120"></a>00120     status = Io_Start( LED_IO, <span class="keyword">true</span> );
<a name="l00121"></a>00121     <span class="keywordflow">if</span> ( status != <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a> )
<a name="l00122"></a>00122       <span class="keywordflow">return</span> status;
<a name="l00123"></a>00123     Io_SetFalse( LED_IO );
<a name="l00124"></a>00124     Io_PioEnable( LED_IO );
<a name="l00125"></a>00125     Io_SetOutput( LED_IO );
<a name="l00126"></a>00126   }
<a name="l00127"></a>00127   Led_users++;
<a name="l00128"></a>00128  
<a name="l00129"></a>00129   <span class="keywordflow">return</span> <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a>;
<a name="l00130"></a>00130 }
<a name="l00131"></a>00131 
<a name="l00132"></a>00132 <span class="keywordtype">int</span> Led_Stop()
<a name="l00133"></a>00133 {
<a name="l00134"></a>00134   <span class="keywordflow">if</span> ( Led_users == 1 )
<a name="l00135"></a>00135   {
<a name="l00136"></a>00136     Io_Stop( LED_IO );
<a name="l00137"></a>00137     Io_SetFalse( LED_IO );
<a name="l00138"></a>00138     Io_PioEnable( LED_IO );
<a name="l00139"></a>00139     Io_SetOutput( LED_IO );
<a name="l00140"></a>00140   }
<a name="l00141"></a>00141   Led_users--;
<a name="l00142"></a>00142 
<a name="l00143"></a>00143   <span class="keywordflow">return</span> <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a>;
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145 
<a name="l00146"></a>00146 <span class="preprocessor">#ifdef OSC</span>
<a name="l00147"></a>00147 <span class="preprocessor"></span>
<a name="l00148"></a>00148 <span class="preprocessor">#include "osc.h"</span>
<a name="l00149"></a>00149 <span class="preprocessor">#include "string.h"</span>
<a name="l00150"></a>00150 <span class="preprocessor">#include "stdio.h"</span>
<a name="l00151"></a>00151 
<a name="l00152"></a>00152 <span class="comment">// Need a list of property names</span>
<a name="l00153"></a>00153 <span class="comment">// MUST end in zero</span>
<a name="l00154"></a>00154 <span class="keyword">static</span> <span class="keywordtype">char</span>* LedOsc_Name = <span class="stringliteral">"led"</span>;
<a name="l00155"></a>00155 <span class="keyword">static</span> <span class="keywordtype">char</span>* LedOsc_PropertyNames[] = { <span class="stringliteral">"active"</span>, <span class="stringliteral">"state"</span>, 0 }; <span class="comment">// must have a trailing 0</span>
<a name="l00156"></a>00156 
<a name="l00157"></a>00157 <span class="keywordtype">int</span> LedOsc_PropertySet( <span class="keywordtype">int</span> property, <span class="keywordtype">int</span> value );
<a name="l00158"></a>00158 <span class="keywordtype">int</span> LedOsc_PropertyGet( <span class="keywordtype">int</span> property );
<a name="l00159"></a>00159 
<a name="l00160"></a>00160 <span class="comment">// Returns the name of the subsystem</span>
<a name="l00161"></a>00161 <span class="keyword">const</span> <span class="keywordtype">char</span>* LedOsc_GetName( )
<a name="l00162"></a>00162 {
<a name="l00163"></a>00163   <span class="keywordflow">return</span> LedOsc_Name;
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165 
<a name="l00166"></a>00166 <span class="comment">// Now getting a message.  This is actually a part message, with the first</span>
<a name="l00167"></a>00167 <span class="comment">// part (the subsystem) already parsed off.</span>
<a name="l00168"></a>00168 <span class="keywordtype">int</span> LedOsc_ReceiveMessage( <span class="keywordtype">int</span> channel, <span class="keywordtype">char</span>* message, <span class="keywordtype">int</span> length )
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170   <span class="keywordtype">int</span> status = <a class="code" href="group___o_s_c_a_p_i.html#g9331ca23d8e81ba91c4e728f0470627e" title="Receive an integer for a subsystem with no indexes.">Osc_IntReceiverHelper</a>( channel, message, length, 
<a name="l00171"></a>00171                                 LedOsc_Name,
<a name="l00172"></a>00172                                 LedOsc_PropertySet, LedOsc_PropertyGet, 
<a name="l00173"></a>00173                                 LedOsc_PropertyNames );
<a name="l00174"></a>00174 
<a name="l00175"></a>00175   <span class="keywordflow">if</span> ( status != <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a> )
<a name="l00176"></a>00176     Osc_SendError( channel, LedOsc_Name, status );
<a name="l00177"></a>00177   <span class="keywordflow">return</span> <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a>;
<a name="l00178"></a>00178 }
<a name="l00179"></a>00179 
<a name="l00180"></a>00180 <span class="comment">// Set the index LED, property with the value</span>
<a name="l00181"></a>00181 <span class="keywordtype">int</span> LedOsc_PropertySet( <span class="keywordtype">int</span> property, <span class="keywordtype">int</span> value )
<a name="l00182"></a>00182 {
<a name="l00183"></a>00183   <span class="keywordflow">switch</span> ( property )
<a name="l00184"></a>00184   {
<a name="l00185"></a>00185     <span class="keywordflow">case</span> 0: 
<a name="l00186"></a>00186       <a class="code" href="group___led.html#ga1057208ee347d14ad90b5da3d744da0" title="Sets whether the Led subsystem is active.">Led_SetActive</a>( value );
<a name="l00187"></a>00187       <span class="keywordflow">break</span>;      
<a name="l00188"></a>00188     <span class="keywordflow">case</span> 1:
<a name="l00189"></a>00189       <a class="code" href="group___led.html#g64a0db609a52e4ef919b13e62f3557a9" title="Control the LED on the MAKE Controller Board.">Led_SetState</a>( value );
<a name="l00190"></a>00190       <span class="keywordflow">break</span>;
<a name="l00191"></a>00191   }
<a name="l00192"></a>00192   <span class="keywordflow">return</span> <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a>;
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194 
<a name="l00195"></a>00195 <span class="comment">// Get the index LED, property</span>
<a name="l00196"></a>00196 <span class="keywordtype">int</span> LedOsc_PropertyGet( <span class="keywordtype">int</span> property )
<a name="l00197"></a>00197 {
<a name="l00198"></a>00198   <span class="keywordtype">int</span> value = 0;
<a name="l00199"></a>00199   <span class="keywordflow">switch</span> ( property )
<a name="l00200"></a>00200   {
<a name="l00201"></a>00201     <span class="keywordflow">case</span> 0:
<a name="l00202"></a>00202       value = <a class="code" href="group___led.html#ga4cc024549d3835bcd0adca90366d881" title="Read the active state of the LED system.">Led_GetActive</a>( );
<a name="l00203"></a>00203       <span class="keywordflow">break</span>;
<a name="l00204"></a>00204     <span class="keywordflow">case</span> 1:
<a name="l00205"></a>00205       value = <a class="code" href="group___led.html#ga22ae43adcee63c5f750649a02c59a65" title="Read the state of the LED on the MAKE Controller Board.">Led_GetState</a>( );
<a name="l00206"></a>00206       <span class="keywordflow">break</span>;
<a name="l00207"></a>00207   }
<a name="l00208"></a>00208   
<a name="l00209"></a>00209   <span class="keywordflow">return</span> value;
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211 
<a name="l00212"></a>00212 <span class="preprocessor">#endif</span>
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  <p class="footer">The Make Controller Kit is an open source project maintained by <a href="http://www.makingthings.com">MakingThings</a>.<br />
    MakingThings code is released under the <a href="http://www.apache.org/licenses/LICENSE-2.0.html" target="_blank">Apache 2.0 license</a>.<br />
    Bug tracker, development wiki and status can be found at <a href="http://dev.makingthings.com">http://dev.makingthings.com</a>.<br />
		This document was last updated on 5 Dec 2007.
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